graves



(No Model.)

E. H. GRAVES.

v HEATING APPARATUS. No. 264,408. Patented Sept. 12,1882.

WiTnEssEs:

INVEN'roR:

N. FETER$ Plwlo-Lilhonnlphu, walmn mm 04 c.

UNITED STATES PATENT OF I E.

EPHRAIM II. GRAVES, OF MORRISON, ILLINOIS, ASSIGNOR OF ONE-HALF TO 0. n. woonaurr,

OF SAME PLAO E.

HEATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 264,408, dated September 12, 1882,

Application filed February 10, 1881. (No model.) I

To all whom it may concern Be it known that I, EPHRAIMI H. GRAVES, of the city of Morrison and State of Illinois,

' have invented a new and useful .Improvement in Heating Apparatus, which improvement is fully set forth in the following specification and accompanying drawing.

The object of my invention is twofold: first, to utilize the waste heat which usually passes out of a stove-pipe and apply such heat to warm the same room or other rooms; and,second,to supply apartments with pure airheated while in its passage from the outer air to the apartments where discharged.

1n the drawing the figure is' a sectional side elevation of part of a stove, the pipe connecting the stove with the chimney, a part of the outer wall, and the relation and attachment of my invention to the aforesaid parts.

A represents the outer wall of abuilding, having the chimney or flue A.

B represents the rear wall of a stove.

U is the pipe, connected in the ordinary way to the stove B at its lower end, and communi- 2 eating in the usual way at its upper end with the chimney or flue A.

D is the floor of the room,on which thestove B is seated.

E is a pipe or tube having continuous sides, and seated in any suitable manner inside of the stove-pipe O. For the purpose of afiixing the tube E to the stove-pipe 0,1 use'two short braces, to a having their upper ends attached to the lower end of the tube E at opposite 3 5 sides thereof, and either fastened to the pipe 0 at their lower ends, or, in case the pipe 0 sets on an iron collar of the stove, having their lower ends resting on such collar. The mode of fastening is not material and may be va- 0 ried, the object being to fix the tube E, as near as may be, inthe center of the stove-pipe O. The tube E is closed at the bottom, and communicates with the outside air by means of the supply-tube F, which latter, at its upper end, 5 extends into the tube E at or near the bottom of the latter, and extends downwardly through the floor D and under the latter outwardly through the wall A at the opening b, where the tube F may be provided with an outwardly-flarin g mouth to facilitate theingress of the air and a screen to prevent the entrance of dirt or obstructions. The upper end of the tube E is closed, except that there is seated therein the discharge-tube G. The dischargetube Gr extends through the top of the stovepipe 0 where the latter turns toward thechimney A. Above the stove-pipe G the tube G is provided with the cross-sections c d, and for the sake of finish, and to secure the strength and permanency of the connections last aforesaid, thisjunction is inclosed in a cylinder, H. From the end of the discharge-tube G and cross-section d tubes conveying the heated air can be' carried any distance in the building and to any apartment, however remote.

I furnish the supply-tube F, near its junction with the tube E,with the cut-offe, for convenience in shutting oif the cold air when the heating is not desired. The cross-section c is intended to assistin heating the room in which the stove is situated, and such-cross section is furnished with the cut-ofi'f, for use when the entire heat is needed for other apartments. Each discharge-pipe which enters an apartment is furnished at itsllischarge endin'snch apartment with a like cut-ofi', by means of which the degree of heat in such apartment may be regulated or the supply of heat cutott'.

The size of the pipe E will vary with that of the stove-pipe O. For an eight-inch stovepipe I find a four-inch inner pipe to be of good operative size. I use gas-pipe for the tube E, as it is essential that there be no seams or joints in itswalls to permit the. gases in the stove-pipe G to escape into the tube E. v

It is not necessary that the stove be placed next an outer wall, as the supply-tube F can be extended indefinitely until it reaches the outer air.

I do not limit myself to any size or characo ter of pipe, nor to the precise locality and relation shown of the different pipes.

In the ordinary use of a stove-pipe the heat from the air lying interiorly next the walls of the pipe is partially radiated through the walls 5 of such pipe; but the center column and greatest quantity of heat passes out with the draft and is lost.

If ventilation is not desired, the supply-pipe F may end and be supplied in the interior of the room in which the stove is placed. tube E may be placed in the drum of a stove.

The operation of my invention is as follows: By opening the cut oife the cold air from the outside passes into the tube E, is there heated, and, by opening the cut-ofi's in any of the dischargepipes, passes out in a heated condition at any locality desired. After the tube E is once heated the current of warm air therefrom is continuous, the cold air continually passing in to all the vacuum.

The advantages of my invention are, first, that I obtain and utilize heat which would he otherwise lost; second,I pass into each apartment not the vitiated heated air of some other apartment, but the pure outside atmosphere; third, I can deliver the heated air at any desired point or elevation in any apartment, however remote, and this without losing any material amount of heat in transitu.

The

My invention is simple, practicable, and convcnient, and is valuable alike on hygienic and economical grounds.

I am aware that a tube forheating and transmitting air has heretofore been placed in a stove-pipe.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is

In combination with the disehargepipe G and cross-pipes 'c and d, the cylinder H, substantially as shown, and for the purpose described.

In testimony that I claim the foregoing as myown I afiix my name hereto in the presence of two witnesses.

EPHRAIM H. GRAVES.

Witnesses:

J. H. Mason, 0. F. WooDnUFF. 

